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KIM [24]
3 years ago
13

20% of the rose Annette picked from a rose garden were red if she picked 10 red roses how many roses did she pick from the garde

n A:50 B:40 C:30 D:20
Mathematics
1 answer:
horrorfan [7]3 years ago
7 0

Answer:

Option A

Annette picked  50 roses  from the garden

Step-by-step explanation:

Let us understand the problem, designating letters to represent unknown quantities.

Let the total number of roses = x

20% of the roses were red means that 20% of x = red

Since the number of red roses = 10,

we will have that 20% of x = 10

mathematically, we will have

\frac{20}{100} \times x = 10\\x= \frac{1000}{20}= 50

hence, Annette picked  50 roses  from the garden

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A ball dropped from the top of a building has a height of s =576- 16t2 meters after t seconds. How long does it take the ball to
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Answer:

It will take 6 seconds for the ball to reach the ground.

Velocity: -192\frac{\text{m}}{\text{s}}.

Step-by-step explanation:

We have been given that a ball dropped from the top of a building has a height of s =576-16t^2 meters after t seconds.

The ball will hit the ground, when height will be 0 meters, so we will equate height with 0 as:

576-16t^2=0

Let us solve for t.

576-576-16t^2=-576

-16t^2=-576

\frac{-16t^2}{-16}=\frac{-576}{-16}

t^2=36

Taking positive square root of both sides, we will get:

\sqrt{t^2}=\sqrt{36}

t=6

Therefore, it will take 6 seconds for the ball to reach the ground.

To find the ball's velocity at t=6, we will take the derivative of position function and evaluate derivative at t=6.

s=576-16t^2

s'=\frac{d}{dt}(576)-\frac{d}{dt}(16t^2)

s'=0-32t

s'(6)=-32(6)

s'(6)=-192

Therefore, the ball's velocity at the moment of impact would be -192\frac{\text{m}}{\text{s}}.

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3 years ago
frank has devised a formula for his catering business that calculate the number of meatballs he need to prepare the number is m=
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3 years ago
Mr. Kelly was checking out his items at Dunkin Donuts, he bought three bags of coffee that cost $6.75 each. There is a sales tax
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Answer:

$22.02

Step-by-step explanation:

3(6.75)(1.0875) = 22.021875 ≈ $22.02 (Assuming the store rounds down.)

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The total cost of four pens and seven mechanical pencils is $9.73. The cost of each mechanical pencil is 0.75 cents. Which repre
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Answer:

(C) $1.12

Step-by-step explanation:

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Hope this helps

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